GM Service Manual Online
For 1990-2009 cars only

Use the Scan Tool Data List under the following conditions:

    • The Diagnostic System Check - Vehicle is complete.
    • The on-board diagnostics are functioning properly.
    • No diagnostic trouble codes (DTCs) are present.

The values below represent a typical display recorded from a properly functioning system.

Important: Do not use a scan tool that displays faulty data. Report the condition to the scan tool manufacturer. The use of a faulty scan tool can result in misdiagnosis and the unnecessary replacement of parts.

Only the parameters listed below are used in this manual for diagnosing. If a scan tool displays other parameters, the values are not recommended by General Motors for use in diagnosis.

Scan tool values below were recorded under the following conditions:

    • Engine at idle
    • Upper radiator hose hot
    • Closed throttle
    • Transmission in Park
    • Closed Loop Operation
    • Accessories OFF
    • Brake pedal not applied

Scan Tool Parameter

Data List*

Units

Typical Data Values

1-2 Shift Time

F0,F2/F6/F0

Seconds

Varies

1-2 Sol.

F0,F2,F3,F4

On/Off

On

1-2 Sol. CKT Status

F2

Yes/No

No

1-2 TAP Cell (4-16)

F6/F0

kPa/Psi

Varies

2-3 Shift Time

F0,F3,F6/F1

Seconds

Varies

2-3 Sol.

F0,F2,F3,F4

On/Off

Off

2-3 Sol. CKT Status

F3

Yes/No

No

2-3 TAP Cell (4-16)

F6/F1

kPa/Psi

Varies

3-4 Shift Error

F4

Seconds

Varies

3-4 Shift Time

F0,F4

Seconds

Varies

4WD

F0

Enabled/Disabled

Disabled

4WD Low

F0

Enabled/Disabled

Disabled

Calc. Throttle Position

F0,F1,F2,F3,F4,F5

%

%

Commanded Gear

F0,F1,F2,F3,F4,F5

1,2,3,4

1

Current TAP Cell

F6/F0,F6/F1

0-16

Varies

ECT

F0,F1

°C (°F)

Varies

Engine Speed

F0,F1,F2,F3,F4,F5

RPM

600-800

Engine Torque

F0,F1

lb ft

10

Gear Ratio

F0,F1,F2,F3,F4

Ratio

3.98:1

Ignition Voltage

F0

Volts

13.5-14.5

Last Shift Time

F0

Seconds

Varies

PC Sol. Actual Current

F0,F5

Amps

0.92 amps

PC Sol. Duty Cycle

F0,F5

%

Varies

PC Sol. Ref. Current

F0,F5

Amps

0.92 amps

Power Take-Off

F0

On/Off

Off

Speed Ratio

F0,F1,F2,F3,F4

Ratio

8.00:1

TCC Brake Switch

F0,F1

Open/Closed

Closed

TCC Duty Cycle

F0,F1

%

0%

TCC Duty Cycle CKT Status

F1

YES/NO

NO

TCC Slip Speed

F0,F1

RPM

+/- 150

TFP Sw.

F0

Park/Drive 1, Invalid

Park/Neutral

TFP Sw. A/B/C

F0

HI/LOW

HI/LOW/HI

TR Sw.

F0

Park/Drive 1 or Park/Low, Open, Invalid

Park

TR Sw. A/B/C/P

F0

HI/LOW

LOW/HI/HI/LOW

Transfer Case Ratio

F0,F2,F3,F4

Ratio

3.22:1

Trans. Fluid Temp.

F0,F1,F5

°C (°F)

Varies

Trans. Slip Counter

F0,F1

0,1,2

0

Transmission Hot Mode

F0,F1

On/Off

Off

Transmission ISS

F0,F1,F2,F3,F4

RPM

600-800

Transmission OSS

F0,F1,F2,F3,F4

RPM

0

Turbine Speed

F0,F1,F2,F3,F4

RPM

600-800

Vehicle Speed

F0,F1,F2,F3,F4

km/h (mph)

0

*Data List Legend

    • F0: Transmission Data
    • F1: TCC Data
    • F2: 1-2 Shift Data
    • F3: 2-3 Shift Data
    • F4: 3-4 Shift Data
    • F5: PC Solenoid Data
    • F6: Transmission Adapts
    • F6/F0: 1-2 Adapt. Data
    • F6/F1: 2-3 Adapt. Data